* app/gegl/gimpoperationpointlayermode.c: Clamp Addition and
Subtract so that we acheieve consistent blending results. Also,
our Addition is fine, it is the formula for 'plus' in the SVG 1.2
draft that is wrong as far as I can see.
svn path=/trunk/; revision=27421
* app/gegl/gimpoperationpointlayermode.c: Continue the quest of
overviewable and readable blend formulas. The macro now expands to
entire case-statements.
svn path=/trunk/; revision=27420
* app/gegl/gimpoperationpointlayermode.c: For blend modes with
conditions, fix so that the conditions are per color
channel. Acheived by introducing a nice little preprocessor macro.
svn path=/trunk/; revision=27412
* app/gegl/gimpoperationpointlayermode.c: Enable the [0..1]
clamping of the output for Dodge and Burn. Without the clamping
one gets inconsistent results when blending together identical
layers but with different opacities. Maybe we should make the
clamping configurable and introduce a HDR compositing mode or
something?
svn path=/trunk/; revision=27411
* app/gegl/gimpoperationpointlayermode.c: Implemented Grain
Extract and Grain Merge. Also corrected the formula for Divide.
Works the same for 100% opaque layers:
o Grain Extract
o Grain Merge
svn path=/trunk/; revision=27410
* app/gegl/gimpoperationpointlayermode.c: Implement a bunch of
layer modes. Use the exact SVG 1.2 formula for layer modes that
have a counterpart in SVG 1.2. Don't clamp the result to [0..1]
for Dodge and Burn though as we don't need to. Maybe we *should*
clamp from a compositing point of view, I'm not sure. Also
reformat the code a bit for readability.
Keep in mind that we now treat the opacity of all layers the same
indepentant of the layer mode. That is why most of the new
implementations doesn't work the same as the legacy ones when
transparency is involved, only when the layers are completely
opaque. Another important property for all layer modes implemented
below is that compositing onto complete transparency gives the
same result as if the layer would have been in Normal blending
mode.
The status of the new layer mode implementations compared to the
legacy implementations is as follows:
Completely works the same:
o Behind
Works the same for 100% opaque layers:
o Multiply
o Screen
o Difference
o Darken
o Lighten
o Dodge
o Burn
o Hard Light
o Subtract
o Divide
Works different but similar:
o Overlay
Work in progress:
o Soft Light
svn path=/trunk/; revision=27409
* app/gegl/gimpoperationpointlayermode.c: Completed the rename
with gimp:layer-mode -> gimp:point-layer-mode and also did some
formating.
* app/core/gimplayer.c: Changed accordingly.
svn path=/trunk/; revision=27408
* app/gegl/gimpoperationlayermode.[ch]: Rename to
* app/gegl/gimpoperationpointlayermode.[ch]: so that we can later
create a common GimpOperationLayerMode class/interface for
non-point layer modes like GimpOperationDissolveLayerMode.
* app/gegl/Makefile.am
* app/gegl/gimp-gegl.c
* app/gegl/gegl-types.h: Adjust accordingly.
svn path=/trunk/; revision=27401
Martin Nordholts